| 摘要 |
PROBLEM TO BE SOLVED: To eliminate a person who visits a game parlor targeting profit on a special service day alone and earns a plenty of prizes. SOLUTION: An IC card 26 is issued to a customer (player) as visitor and the IC card 26 is loaded into an IC card reader/writer 24 at each entry into the game parlor to update the date (the frequency of visit, the entry time, and the like) at his entry. Professionals targeting opening day profits are specified from the customers visiting the game parlor on the special service day, or the like, following the replacement with new machines. This method enables taking of steps, for example, the limiting of visit to the game parlor.
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